package com.meow_woof.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.meow_woof.constant.MessageConstant;
import com.meow_woof.context.BaseContext;
import com.meow_woof.dto.*;
import com.meow_woof.entity.*;
import com.meow_woof.exception.AddressBookBusinessException;
import com.meow_woof.exception.OrderBusinessException;
import com.meow_woof.exception.ShoppingCartBusinessException;
import com.meow_woof.mapper.*;
import com.meow_woof.result.PageResult;
import com.meow_woof.service.OrderService;
import com.meow_woof.utils.HttpClientUtil;
import com.meow_woof.utils.WeChatPayUtil;
import com.meow_woof.vo.OrderPaymentVO;
import com.meow_woof.vo.OrderStatisticsVO;
import com.meow_woof.vo.OrderSubmitVO;
import com.meow_woof.vo.OrderVO;
import com.meow_woof.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Value("${meow-woof.shop.address}")
    private String shopAddress;

    @Value("${meow-woof.baidu.ak}")
    private String ak;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 处理退款
     */

    private void handleRefund(){
        // 模拟退款结果
        JSONObject refundResult = new JSONObject();
        refundResult.put("code", "SUCCESS");
        refundResult.put("refundId", "mockRefundId123");

        // 判断模拟退款结果
        if (!"SUCCESS".equals(refundResult.getString("code"))) {
            throw new OrderBusinessException("退款失败");
        }
    }
    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //处理各种业务异常（地址簿为空、购物车为空、用户的收货地址是否超出配送范围）
        AddressBook addressBook=addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        String address=addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail();
        if(addressBook==null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);

        }
        //检查用户的收货地址是否超出配送范围
        checkOutOfRange(address);
        //查询当前用户的购物车数据
        Long userId= BaseContext.getCurrentId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList=shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList==null|| shoppingCartList.size()==0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入1条数据
        Orders orders =new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orders.setAddress(address);

        Integer packAmount=0;
        for (ShoppingCart sc:shoppingCartList){

            packAmount+=sc.getNumber();
        }
        System.out.println(packAmount);
        orders.setPackAmount(packAmount);

        orderMapper.insert(orders);
        //向订单明细表插入n条数据
        List<OrderDetail> orderDetailList=new ArrayList<>();
        for (ShoppingCart cart:shoppingCartList){
            OrderDetail orderDetail=new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO orderSubmitVO= OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();


        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "喵汪食光订单", //商品描述
                user.getOpenid() //微信用户的openid
        );*/
        //生成空JSON，跳过微信支付流程
        JSONObject jsonObject=new JSONObject();


        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map=new HashMap();
        map.put("type",1);//1表示来单提醒 2表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号："+outTradeNo);

        String json =JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);


        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> pageList= orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (pageList != null && pageList.getTotal() > 0) {
            for (Orders orders : pageList) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(pageList.getTotal(), list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Transactional
    public OrderVO getById(Long id) {
        Orders orders=orderMapper.getById(id);

        List<OrderDetail> list=orderDetailMapper.getByOrderId(id);
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(list);
        System.out.println(orderVO);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void cancel(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // 调用微信支付退款接口（真实调用已注释掉）
        /*
        weChatPayUtil.refund(
                ordersDB.getNumber(), //商户订单号
                ordersDB.getNumber(), //商户退款单号
                new BigDecimal(0.01),//退款金额，单位 元
                new BigDecimal(0.01));//原订单金额
        */
            handleRefund();

            // 支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        if (page.getTotal()==0) throw new OrderBusinessException("未找到相关订单");
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed=orderMapper.count(Orders.TO_BE_CONFIRMED);
        Integer confirmed=orderMapper.count(Orders.CONFIRMED);
        Integer deliveryInProgress=orderMapper.count(Orders.DELIVERY_IN_PROGRESS);
        return new OrderStatisticsVO(toBeConfirmed,confirmed,deliveryInProgress);
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        Orders orders=orderMapper.getById(id);
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        List<OrderDetail> list=orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     * @return
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders=Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     * @return
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Long id=ordersRejectionDTO.getId();
        Orders orders= orderMapper.getById(id);
        if(orders.getStatus()==Orders.TO_BE_CONFIRMED){

            orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
            orders.setStatus(Orders.CANCELLED);


            orders.setCancelTime(LocalDateTime.now());

            handleRefund();
            // 支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
            orderMapper.update(orders);

        }else throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
}

    /**
     * 商家取消订单
     *
     * @param ordersCancelDTO
     * @return
     */
    public void merchantCancel(OrdersCancelDTO ordersCancelDTO) {
        Long id=ordersCancelDTO.getId();
        Orders ordersDB=orderMapper.getById(id);
        if(ordersDB.getPayStatus()==Orders.PAID){
            handleRefund();
            ordersDB.setPayStatus(Orders.REFUND);
        }
        ordersDB.setStatus(Orders.CANCELLED);
        ordersDB.setCancelReason(ordersCancelDTO.getCancelReason());
        ordersDB.setCancelTime(LocalDateTime.now());
        orderMapper.update(ordersDB);

    }

    /**
     * 派送订单
     *
     * @param id
     * @return
     */
    public void delivery(Long id) {
        Orders orders=orderMapper.getById(id);
        if (orders.getStatus()==Orders.CONFIRMED){
            orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
            orderMapper.update(orders);
        }

    }

    /**
     * 完成订单
     *
     * @param id
     * @return
     */
    public void complete(Long id) {
        Orders orders=orderMapper.getById(id);
        if (orders!=null&&orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            orders.setStatus(Orders.COMPLETED);
            orders.setDeliveryTime(LocalDateTime.now());
            orderMapper.update(orders);

        } else throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
    }

    /**
     * 用户催单
     *
     * @param id
     * @return
     */
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB=orderMapper.getById(id);
        //校验订单是否存在
        if (ordersDB==null) throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        Map map=new HashMap();
        map.put("type",2);//1表示来单提醒 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号："+ ordersDB.getNumber());
        //通过websocket向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
